18215571

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{557}}^1\times {\mathrm{991}}^1$

素因数の和:1562

約数の個数: 16

約数和(自身を含む): 26569728

約数和(自身を除く): 8354157

約数列:

[1, 3, 11, 33, 557, 991, 1671, 2973, 6127, 10901, 18381, 32703, 551987, 1655961, 6071857, 18215571]

約数ペア:

[(1, 18215571), (3, 6071857), (11, 1655961), (33, 551987), (557, 32703), (991, 18381), (1671, 10901), (2973, 6127)]